1 Tb/s converged optical metro-access transmission based on wavelength division multiplexed orthogonal frequency division multiple access passive optical network (WDM-OFDMA-PON)
AssigneeNEC Laboratories America, Inc.
InventorsNeda Cvijetic, Milorad Cvijetic, Ting Wang
Life of this patent
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Abstract
A Wavelength Division Multiplexed Orthogonal Frequency Division Multiple Access Passive Optical Network (WDM-OFDMA-PON) includes a passive last-mile optical split terminated by optical network units (ONUs) with OFDMA transceivers; a standard single mode fiber (SSMF) link; a central office optical line terminal (CO-OLT) coupled to SSMF link and the passive last-mile optical split, wherein the CO-OLT comprises an OFDMA transceiver, burst-mode-free operation, inline optical dispersion compensation free operation, and WDM-enabled operation.
Claims21
A Wavelength Division Multiplexed Orthogonal Frequency Division Multiple Access Passive Optical Network (WDM-OFDMA-PON), comprising:
- a central office optical line terminal (CO-OLT) comprising downstream OFDMA transmitters and continuous wave (CW) lasers and upstream coherent OFDMA receivers;
- a downstream path from the CO-OLT to optical network units (ONUs);
- an upstream path from said ONUs to the CO-OLT
- wherein the CO-OLT comprises one or more wavelength division multiplexing arrayed waveguide gratings (WDM AWGs) coupled to a diplexer and wherein the diplexer aggregates OFDMA and CW signals and transmitted over the downstream SSMF to a local exchange (LE), where downstream signals are optically amplified and routed with a second diplexer or second optical coupler, AWGs, and third diplexer or third optical coupler into downstream/upstream (DS/US) wavelength pairs for distribution to the OFDMA-PONS.
A Wavelength Division Multiplexed Orthogonal Frequency Division Multiple Access Passive Optical Network (WDM-OFDMA-PON), comprising:
- a CO optical line terminal (CO-OLT), including
- OFDMA transmitters coupled to an AWG and aligned onto a wavelength grid;
- an array of continuous wave (CW) signals from lasers with upstream wavelengths combined by a channel-spaced AWG;
- and
- a first diplexer or first optical coupler aggregating OFDMA and CW signals transmitted over a downstream SSMF to a local exchange (LE), where downstream signals are optically amplified and routed with a second diplexer or second optical coupler, AWGs, and third diplexer or third optical coupler into downstream/upstream (DS/US) wavelength pairs for distribution to the OFDMA-PONS.
Dependencies are inferred from the claim text.